青藏高原条件下现场分析方法的适应性   总被引：1，自引：0，他引：1  

张素荣  杨帆  张华 《物探与化探》2014,(1):100-105

针对青藏高原的特殊环境和区域化探异常查证周期长的特点,开展了现场分析测试的适应性研究。选择便携台式X荧光仪,对仪器进行了标定,考察了仪器的稳定性,确定了样品的加工粒级为-160目和粉末状试样。通过亚卓查证区现场分析,其结果与室内分析结果基本相符,达到了试验研究目的,确定了一种及时提供分析结果的现场分析方法,采用该方法可有效缩短异常查证周期。  相似文献   

A New Method for Determining Fluid Compositions in the H20-NaCl-CaCl2 System with Cryogenic Raman Spectroscopy     

CHI Guoxiang  CHU Haixi  Ryan SCOTT  CHOU I-Ming 《《地质学报》英文版》2014,88(4):1169-1182

Raman peaks of various hydrates in the H20-NaCl-CaCl2 system have been previously identified, but a quantitative relationship between the Raman peaks and XNaCl （i.e.,NaCl/ （NaCl＋CaCl2）） has not been established, mainly due to the difficulty to freeze the solutions. This problem was solved by adding alumina powder to the solutions to facilitate nucleation of crystals. Cryogenic （-185℃） Raman spectroscopic studies of alumina-spiced solutions indicate that XNaCl is linearly correlated with the total peak area fraction of hydrohalite. Capsules of solutions made from silica capillary were prepared to simulate fluid inclusions. Most of these artificial fluid inclusions could not be totally frozen even at temperatures as low as -185℃, and the total peak area fraction of hydrohalite is not correlated linearly with XNaCI. However, the degree of deviation （△XNaCl） from the linear correlation established earlier is related to the amount of residual solution, which is reflected by the ratio （r） of the baseline ＂bump＂ area, resulting from the interstitial unfrozen brine near 3435 cm^-1, and the total hydrate peak area between 3350 and 3600 cm^-1. A linear correlation between △XNaCl and r is established to estimate XNaCl from cryogenic Raman spectroscopic analysis for fluid inclusions.  相似文献   

GFRP管—型钢活性粉末混凝土组合短柱轴压性能     

姜良芹  宋化宇  计静  张云峰  滕振超  姜丽  杨毛毛 《东北石油大学学报》2021,45(3):111-122

以GFRP管直径、管厚度、纤维缠绕层数和角度,以及长细比、活性粉末混凝土(RPC)抗压强度、型钢截面面积、型钢屈服强度为主要参数,设计25根足尺GRS组合短柱试件;基于钢材的双线性本构模型和考虑RPC约束效应的非线性本构模型,采用ABAQUS有限元软件,对25根足尺GRS组合短柱进行数值模拟分析,分别提取荷载—位移曲线和轴压承载力,分析不同参数对试件轴压承载力和极限位移的影响规律;采用1stOpt软件统计回归足尺GRS组合短柱轴压承载力计算公式.结果表明:随试件的GFRP管直径和管厚度、纤维缠绕层数和角度、型钢屈服强度和截面面积、活性粉末混凝土抗压强度增加,试件轴压承载力显著提高;随试件的GFRP管厚度、纤维缠绕层数和角度、长细比和工字型钢截面面积增加,试件极限位移明显增大;随试件的GFRP管直径增加,试件极限位移逐渐减小.试件表现很好的持荷能力,呈连续鼓曲的破坏形态.  相似文献   

能量色散X射线荧光光谱仪现场快速测定多金属矿中17种组分   总被引：3，自引：2，他引：1  

龙昌玉  李小莉  张勤  李国会 《岩矿测试》2010,29(3):313-315

直接使用粉末样品,用Minipal 4便携式能量色散X射线荧光光谱仪测定多金属矿样品中的三氧化二铝、氧化镁、二氧化硅、氧化钾、氧化钙、三氧化二铁、硫、铜、锰、锌、铋、锑、铅、镓、银、砷、锡等17种组分,方法简便、快速,用多金属矿石国家一级标准物质验证,分析结果与标准值基本符合;精密度试验表明,各组分的相对标准偏差(RSD,n=12)均小于12%,能够满足矿山和野外现场快速测定的要求。  相似文献   

灰岩和白云岩的X射线荧光光谱分析   总被引：2，自引：0，他引：2       下载免费PDF全文

袁家义  张文玲  白雪冰  钱惠芬 《山东国土资源》2003,19(5):43-45,51

使用XRF粉末压片法可直接测定灰岩和白云岩中的主要化学成分,对样品进行15min研磨和使用30×10~2 MPa的制样压力,可以减小基体效应中的粒度效应,再通过数学校正法消除基体效应中的吸收、增强效应,分析结果的准确度和精密度可与化学法相比。  相似文献   

一种仿苏纪石材料的宝石学特征     

丛众  吴瑞华  王时麒  师伟 《地质科学译丛》2011,(1):16-20,42

采用宝石显微镜、偏光显微镜、电子探针、X射线粉末衍射仪和傅里叶变换红外光谱仪等测试方法对近期在北京珠宝市场上大量出现的一种仿苏纪石材料样品进行了常规宝石学、矿物学、谱学特征研究。结果表明,该仿苏纪石材料是以透闪石为主要矿物、石英为次要矿物的染色玉石;其与天然苏纪石的主要鉴别特征为：该仿苏纪石材料的密度较大,表面较粗糙以及特征的红外光谱。  相似文献   

一种绿色“斑马石”玉料的矿物组成研究     

燕唯佳  李立平  刘虹靓 《地质科学译丛》2013,(1):15-22

最近在江苏东海的水晶市场上出现了一种名为“斑马石一的玉石,该玉石总体颜色为墨绿色,其中有白色条纹呈带状分布并呈丝绢光泽。为了查明其组成,利用偏光显微镜、X射线粉末衍射仪、红外光谱仪、拉曼光谱仪以及激光诱导离解光谱仪等测试方法对该样品进行了测试分析。结果表明,该“斑马石”实际就是一种蛇纹石的集合体材料。其绿色部分的主要矿物组成为利蛇纹石,其次为绿泥石,白色部分由纤蛇纹石构成,含少量绿泥石,黑色包裹体为磁铁矿。这种材料不同于一般的蛇纹石玉,在于该玉石中含有一些定向的纤蛇纹石的平行纤维条带,正是这种纤维状平行排列的结构,导致了“斑马石”中呈丝绢光泽的条带。“斑马石”的折射率,相对密度及荧光特征与一般的蛇纹石玉无差异。  相似文献   

Characteristics of Elemental Composition of PM2.5 in the Spring Period at Tongyu in the Semi-arid Region of Northeast China   总被引：4，自引：0，他引：4  

ZHANG Renjian  FU Congbin  HAN Zhiwei  ZHU Chongshu 《大气科学进展》2008,25(6):922-931

Continuous observations of mass concentration and elemental composition of aerosol particles （PM2.5） were conducted at Tongyu, a semi-arid site in Northeast China in the spring of 2006. The average mass concentration of PM2.5 at Tongyu station was 260.9±274.4 μg m^-3 during the observation period. Nine dust events were monitored with a mean concentration of 528.0±302.7 μgm^-3. The PM2.5 level during non- dust storm （NDS） period was 111.65±63.37 μg m^-3. High mass concentration shows that fine-size particles pollution was very serious in the semi-arid area in Northeast China. The enrichment factor values for crust elements during the dust storm （DS） period are close to those in the NDS period, while the enrichment factor values for pollution elements during the NDS period are much higher than those in the DS period, showing these elements were from anthropogenic sources. The ratios of dust elements to Fe were relative constant during the DS period. The Ca/Fe ratio in dust aerosols at Tongyu is remarkably different from that observed in other source regions and downwind regions. Meteorological analysis shows that dust events at Tongyu are usually associated with dry, low pressure and high wind speed weather conditions. Air mass back-trajectory analysis identified three kinds of general pathways were associated with the aerosol particle transport to Tongyu, and the northwest direction pathway was the main transport route.  相似文献   

青海东昆仑、祁曼塔格地区金刚石钻头的研究          下载免费PDF全文

吴海霞  欧阳志勇  李春  沈立娜  梁涛 《探矿工程》2017,44(3):77-80

针对青海省东昆仑、祁曼塔格地区的典型硬岩强研磨性地层情况,对孕镶金刚石钻头胎体材料、金刚石浓度、烧结工艺等方面进行分析研究,并对钻头进行了台架、野外试验。根据各项理论分析结合实验数据,确定了钻头的设计方案,研发出了适用于该地区硬岩强研磨地层钻进的孕镶金刚石钻头。  相似文献   

X射线荧光光谱快速分析铝土矿的方法研究   总被引：7，自引：4，他引：7  

邓赛文  梁国立  方明渭  田寅贞  强小平  王有增 《岩矿测试》2001,20(4):305-308

使用日本理学3070型X射线荧光光谱仪,采用粉末直接压片和经验系数校正基体效应的方法,在矿山实验室实现了铝土矿样品中Al  相似文献